GPIO lines

General Purpose Input Outpus (GPIO) lines are used on STK1000 to connect to LED's and switches and for general usage.

Signals

GPIO signals on STK1000 are mapped to the following ports on AP7200. The third column list which switch to select in order to connect the AP7200 ports to the STK1000 GPIO signals.

Note that several IO lines are used for peripherals on the STK1000 and may have pull-up or pull-down connected.

STK1000 GPIO signalsAP7200 portsSelected by switch
GPIO0PC0SW5
GPIO1PC1SW5
GPIO2PC2SW5
GPIO3PC3SW5
GPIO4PC4SW5
GPIO5PC5SW5
GPIO6PC6SW7
GPIO7PC7SW7
GPIO8PC8SW7
GPIO9PC9SW7
GPIO10PA28(direct)
GPIO11PA29(direct)
GPIO12PA30SW5
GPIO13PA31SW5
GPIO14PB14SW10
GPIO15PB15SW10
GPIO16PC10SW3
GPIO17PC11SW3
GPIO18PC12SW3
GPIO19PC13SW3
GPIO20PC14SW3
GPIO21PC15SW3
GPIO22PC16SW3
GPIO23PC17SW3
GPIO24PA20(direct)
GPIO25 not connected
GPIO26PA21shared with Nexus
GPIO27PA22shared with Nexus
GPIO28PA23shared with Nexus
GPIO29PA8SW7
GPIO30PA6SW3
GPIO31PA7SW3